No artistic ability necessary. Just open MS Paint or any image editor available to you and draw screens, areas, elements, characters, objects, or anything from your favourite games. Don't get too detailed or anything like unnecessary shading or something. Just do a quick mockup. The idea is that it's supposed to look bad.

Jules wrote:
It's probably because you're tackling a VGA shot as opposed to EGA. But then, it makes it that much more amusing!

It's by far one of the most memoriable scenes in Sierra games for me... because I remember playing LSL1 to death... and then when I got LSL2... that opening scene... I thought, "OMG! Check out these graphics! This is awesome!"